Using VM Ware for Exchange failover

Hello Experts,
we are investigating creating a fail over for a customers exchange.
They have exchange 2010 on one windows 2008 server, we are looking to propose V centre essentials for DAG fail over. VM ware advise that a link between 2 servers would suffice. My question is what else should we be considering with an install like this and would a third server be unnecessary?
Is it just the V center license we need? rrp $5600
we would look to place an identical server as its mirror
I gather we don't need another exchange license.
How much time should we schedule to configure something like this?
thanks in advance

Is this for on-site or off-site failover? Do you have any numbers on the size of the current Exchange server (user count, database size, etc.)? Is the current server virtualized? Are you looking to do two standalone servers where one is a mirrored failover of the production box?

Let's split this into two main discussion groups. One is about how you're planning to update the Exchange deployment to meet your client's needs and two would be using VMware to make that happen.

What exactly do you plan to do with Exchange? Are you looking for database redundancy only using DAG or are you going to deploy additional roles? You do realize that you'll need additional server licenses for this, right?

Once we can lock down what you want to deploy then folks can give you more feedback on leveraging VMware to make that happen in the best way possible.